Commit 8911c9e3 authored by Sergei Shtylyov's avatar Sergei Shtylyov Committed by James Bottomley
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[SCSI] aic79xx: fix MMIO for PPC 44x platforms

The driver stores the PCI resource address into 'u_long' variable before
calling ioremap_nocache() on it. This warrants kernel oops when the registers
are accessed on PPC 44x platforms which (being 32-bit) have PCI memory space
mapped beyond 4 GB.

The arch/ppc/ kernel has a fixup in ioremap() that helps create an illusion
that the PCI memory resources are mapped below 4 GB, but arch/powerpc/ code
got rid of this trick, having instead CONFIG_RESOURCES_64BIT enabled.
Signed-off-by: default avatarSergei Shtylyov <>
Signed-off-by: default avatarJames Bottomley <>
parent 44850413
......@@ -360,7 +360,7 @@ struct ahd_platform_data {
#define AHD_LINUX_NOIRQ ((uint32_t)~0)
uint32_t irq; /* IRQ for this adapter */
uint32_t bios_address;
uint32_t mem_busaddr; /* Mem Base Addr */
resource_size_t mem_busaddr; /* Mem Base Addr */
/************************** OS Utility Wrappers *******************************/
......@@ -249,8 +249,8 @@ ahd_linux_pci_exit(void)
static int
ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
u_long *base2)
ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, resource_size_t *base,
resource_size_t *base2)
*base = pci_resource_start(ahd->dev_softc, 0);
......@@ -272,11 +272,11 @@ ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
static int
ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
u_long *bus_addr,
resource_size_t *bus_addr,
uint8_t __iomem **maddr)
u_long start;
u_long base_page;
resource_size_t start;
resource_size_t base_page;
u_long base_offset;
int error = 0;
......@@ -310,7 +310,7 @@ int
ahd_pci_map_registers(struct ahd_softc *ahd)
uint32_t command;
u_long base;
resource_size_t base;
uint8_t __iomem *maddr;
int error;
......@@ -346,31 +346,32 @@ ahd_pci_map_registers(struct ahd_softc *ahd)
} else
command |= PCIM_CMD_MEMEN;
} else if (bootverbose) {
printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
printf("aic79xx: PCI%d:%d:%d MEM region 0x%llx "
"unavailable. Cannot memory map device.\n",
(unsigned long long)base);
if (maddr == NULL) {
u_long base2;
resource_size_t base2;
error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
if (error == 0) {
ahd->tags[0] = BUS_SPACE_PIO;
ahd->tags[1] = BUS_SPACE_PIO;
ahd->bshs[0].ioport = base;
ahd->bshs[1].ioport = base2;
ahd->bshs[0].ioport = (u_long)base;
ahd->bshs[1].ioport = (u_long)base2;
command |= PCIM_CMD_PORTEN;
} else {
printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
"unavailable. Cannot map device.\n",
printf("aic79xx: PCI%d:%d:%d IO regions 0x%llx and "
"0x%llx unavailable. Cannot map device.\n",
base, base2);
(unsigned long long)base,
(unsigned long long)base2);
ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
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